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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The more stressed out the male is - the less sperm he is going to produce






2. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






3. Failure to have one testis (gonad) to descend






4. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






5. Look for infection - split - and rupture of the penis






6. 30-38 hours after estrus cycle begins






7. 14-19 (17) days






8. 26 hours after estrus begins






9. 16-20 hours






10. 45-60 days after breeding; re-breed as required






11. (male) pushes the testes outward toward the legs for a cool-down off of the body






12. Duct through penis that carries sperm and urine






13. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






14. Can survive ~7 days in cow. vast majority <48 hours






15. 2 month growth cycle. stored in the epididymis of the bull






16. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






17. Way to know everything is alright with the breeding male






18. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






19. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






20. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






21. 10-37 (21) days






22. 19-23 (21) days






23. 265-285 days






24. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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25. Parturition is controlled by...






26. Help to signal hormone levels which we need both in the brain right next to each other.






27. Animals which have only one estrous cycle (ex: dog - fox)






28. Not under a timeline - cow can not be sold as steak






29. Animals which have many estrous periods per year (ex: cow - sow)






30. Prevent the cow from getting an infection from the calve






31. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






32. 336 days






33. Implies the amount of estrogen production






34. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






35. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






36. 2 month growth cycle. stored in the epididymis of the bull






37. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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38. The more stressed out the male is - the less sperm he is going to produce






39. Birthing process (termination of gestation)






40. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






41. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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42. (LH) causes female's egg to break (her period)






43. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






44. Male on one pin and female on other side






45. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






46. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






47. What helps regulate spermatogenesis?






48. Days which have decreasing daylight hours

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49. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






50. Urinary calculi.